GLG 121 Study Guide - Final Guide: Porosity, Focus 3, Total Dissolved Solids
12 Dec 2016
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Ages (earth, universe: earth 4. 5 billion years, universe 14 billion years. Definition of a mineral: minerals make up practically everything we use in one way or another, naturally occurring, specific chemical composition, specific crystal structure, inorganic, solid. Three types of rocks and how they form: metamorphic rock. Shale is the most abundant sedimentary rock. Sedimentary rocks form by compaction and cementation. How fast do plates move: about an inch per year. Continental crust: continental crust is older than oceanic crust because it is lighter and does not sink, from continental crust about 4 billion years, from oceanic crust about 2 million years (since pangaea started breaking up) Names of most recent supercontinents: 1. Rodinia 750 million 1. 1 billion years ago: 3. What is a hot spot: an area with significant volcanic activity. Why are volcanoes found all around the pacific ocean: it is the location of most of earth"s subduction zones. Types of volcanoes: low to high.
